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What is the working principle of electromagnetic flow meter?

Views: 0     Author: Site Editor     Publish Time: 2022-04-20      Origin: Site

Electromagnetic flow meter is a flow detection device that developed rapidly after the relationship between electricity and magnetism was discovered. So, what is the working principle of electromagnetic flow meter?


The following is the outline:

1.What is the main composition of electromagnetic flow meter?

2.What is the working principle of electromagnetic flow meter?

3.What should be paid attention to when using electromagnetic flow meter?


What is the main composition of electromagnetic flow meter?

1.Magnetic circuit system. The permanent magnet is used to create a DC or AC magnetic field, so as to achieve the interaction between electricity and magnetism, and form a flow environment suitable for detection.

2.shell. It is made of ferromagnetic material, which is the outer cover of the excitation coil of the distribution system, and isolates the interference of the external magnetic field.

3.lining. On the inner side of the measuring pipe and the flange sealing surface, there is a complete electrical insulating lining. It directly contacts the liquid to be measured, and its function is to increase the corrosion resistance of the measuring tube and prevent the induced potential from being short-circuited by the wall of the metal measuring tube. The lining materials are mostly corrosion-resistant, high-temperature and wear-resistant polytetrafluoroethylene plastics, ceramics, etc.


What is the working principle of electromagnetic flow meter?

1.Faraday’s electromagnetic induction is quantitative. In the artificially created magnetic field environment, the conductor is suitable for cutting the magnetic field lines, and the induced electric potential generated will have an impact on the magnetic field.

2.The effect of conductive fluid and magnetic field. The fluid in some loading equipment has conductive properties. When it flows in a magnetic field and cuts the magnetic induction force lines, it will generate an induced electric potential in the electrode of the loading pipe.

3.Right-hand rule. The electromagnetic relation calculation is applicable to the right-hand rule. Therefore, the measurement can be completed by the direct correlation between the induced electric potential, the magnetic induction intensity, the inner diameter of the pipe, and the flow velocity.


What should be paid attention to when using electromagnetic flow meter?

1.Pay attention to errors. Errors are unavoidable. Therefore, an appropriate accuracy level should be introduced within the specified flow range, or the quoted error can be used to calculate the actual flow.

2.Choose according to the pipe diameter. Different pipe diameters correspond to different measurement accuracy. When the measurement is not accurate, the diameter of the electromagnetic flow test equipment can be reduced to increase the flow rate and obtain a more clear flow measurement.


In short, the electromagnetic flow meter benefits from Faraday's law of electromagnetic induction, and is especially commonly used in industrial production measurement. It requires the operator to have a certain understanding of the basic principles of electromagnetics. Lianyungang Loadarm Industry Co., Ltd. (LICO) is a company thought about closely in the production, manufacturing and sales of fluid loading and unloading equipment. If you have more doubts about electromagnetic flow measurement equipment, welcome to consult us.


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